Reliability and Normative Data of The Knee Extensors' Rate of Force Development Among Healthy Participants

Using a fixed HHD (microfet2) and 3D printed adapter, we assessed the knee extensor muscles in a seated position at the edge of a treatment bed.
The participants performed three maximum isometric knee extension trials. Out of them, the peak force, mean force , early phase Rate of Force Development, and late phase Rate of Force Development(0-100ms and 0-200ms, respectively).
Test-retest, intra-rater reliability, was measured with three timepoints. T1, T2 (30 minutes after T1), and T3 (a week after T1)

1= Males
2= Females